Hydraulic molding press



J. LAUTERBACH' r 2,227,265

HYDRAULIC MOLDING PRESS I Filed Oct. 11, 1938 4 Sheets-Sheet l'nuer'ziarDec. 31, 1940. J. LAUTERBACH HYDRAULIC MOLDING- PRESS 4 sheets-5118a 2Filed 006. 11. 1938 imvemir lo/an L awfmwchj @1 am J. LAUTERBACHHYDRAULIC 5101mm PRESS fies. 31, 1940.

' 4 Sheets-Sheet 3 Filed cm. 11. was

lrwntbr 110/021, Lawtermqh 6 0- .1. LAUTERBACH 2 K mum 1c MOLDING PRESS.

Filed Oct. 11, 1938 4 Sheets-Sheet 4 llllllllfllllllll llll INVENTORJw/v [6072??5596' ATTORNEY i trol mechanism. I

I Patented Dec. 3l, 1940 m-rE-D 's'rli'rss PATENT .zszmes I I v OFFICEmmune uomnveriuiss I 4 John Lauterbaeh, Philadelphia, Pa, assig'nor, by

an Stillman Jersey d mesne assignments, to The Watson- -Co., Roselle, N.1., a corporation of New Appllcaflon October 11, 1938, Serial No.234,365

'19 Claims.

This invention relates to hydraulic molding presses used in the plasticarts, particularly in the I manufacture of articles from syntheticresins, and

specifically to presses adapted for use with three 5 part molds. Y

The object of this invention is to provide a hydraulic molding presshaving a. single horizontal mold-supporting platen movable in its ownplane,

and vertically movable with respect to the horizon- 10 tel plane of thepress bed; and two vertical mold supporting platens, one of said platensbeing fixed and immovable the other platen being movable solely in ahorizontal plane. j

Another object oi. this invention is to provide l6 co-operativemechanical means between the horizontal, platen and, the movablevertical platen,

whereby automatic ejection of the molded parts may be readily eiiected;the respective movable platens being actuated by hydraulic rams tobrins2 the respective mold parts into proper angular relation.

Further objects and advantages will be apparent from the followingdescription 01' the invention as is hereinafter-fully disclosed. In theaccompanying drawings: Figure 1 is a'iront elevation or the pressembodying the inven on.

Fig. 2 is a planew, partly insectio'n. taken at.

line a-a in Figure 1, showing the movable hotll zontal platen.

Fig. 3 is an end elevation taken below the linev H in Figure 1, showingthe hydraulic cylinder control mechanism.

Fig. 4 is an end elevation showing the ieedgon- K v Fig. 5 is a aticview oi electrical timing mechanism for controlling the operation of thepress. v Figs. 6, 7, 8, 9 and 10 are diagrammatic views of the contactcams oi the timing mechanism,

showing the cams in theirrelative positions with respect to the fixedcontacts. o Various well known partsoi. ahydraulic molding-press havebeen omitted iron: the drawings to permit an accurate tureshereindescribed.

The reference characters indicate the same parts in the severaldrawings. In the practice oi'the inventiom-as shown in disclosure oi thenovel iea 'lever 8,,iorces downward ens 2-1: and l-a, each of the saidplatens being provided with suitable integral sleeve members 38'slidably engaging said tension rods.

The hydraulic fluid conducting means is not shown in detail ordescribed, 'as these, and the vari- 5 a ous'means for heating mountedmolds are well knownin the art, any-oi which may be employed. Theautomatic electric timer shown diagrammatically in Figs. 5 and 6 is ofthe type shown in Patent No. 1,655,815, dated January 10, 1928. It 10comprises a series of contact cams mounted on a single shaft, theindividual cams being set with relation to each other to make electricalcontacts at predetermined intervals during the cycle or operation. Eachcam in the group energizes a 15 solenoid controlling one phase of thepress operation.

The hydraulic valves. which control the recipro-. eating movement of thehydraulic rams I and 2, are directly operated by'two compressed air0371- go inders l and 4. Each aireylinder piston rod is operativelyconnected to its respective hydraulic [valve stem 5, (see Fig. 3) bymeans of connectin links 6 and I, pivoted in a lever 8,.said lever 4 2when setting up the press for molding.

Each end of the air valve control levers I4 and I5 is connected to asolenoid'by meansoi the links ll. Fig. 3 may be followed to note thesequence of operation or each of the solenoids, the interm- 40 diatehydraulic ram controlling means being identical, as follows; solenoid ithaving been energized by the timer, pulls down the link llthereby'opening an air port to cylinder t impelling the pistonthereinupward, and the link 6, and the 4; link 1 connected to I thehydraulic valve stem 5, thereby causing the Figure I, the conventionalsteel tension barso'r rods as are provided to maintain spaced relationbetween'the bed portions II and 36, and the hy-' drauliccylinder-mountings, 2' and i' .o! the respective parts of the press.Two'tension rods of e as. each group serve as guides ior the movableplatand the solenoids It and 2| control the vertical hydraulic ram I tomove outward toclose the mold sections h and a. 0n reversing thedirection of the air valve lever I! through the timer energizing so .thesolenoid it (see also Figure 1), the ram movement is reversed and themold is opened. The solenoids l8 and is control the horizontal ram I,

hydraulic ram 2.

' Figure 1, shows the press in a closed position l-a and |b is occupiedby a split mold, the

respective sections thereof, a and b, being seemed to platens |-a and.l-b; The position offthe vertical hydraulic ram platen 2-a is shown at apoint prior to the completion 'of itsu ard stroke.

The platen 2' has mounted there 11 an'angular link supporting member 23,and a pivoted link 24, said link having a catch 25 thereon adapted toengage a compressed air valve control lever 26, the link 24 being heldin operative engagement with the lever 23 by means of a spring 29.

The valve lever 26 is held in a neutral or closed position by a spring3'I, as shown in Fig. 4, and

in which position a feeder slide 3| retains a feeder (not'shown')ismountedat its outward 'end, said feeder being adapted to forwardmolding powders contained in the hopper '30 to the mold openings. Theair valve control lever 23 is extended forwardly from its pivot toprovide an1 arm 26' for manual manipulation of the air va ve.

' The feeder slide 3| has mounted thereon an angular member 32 to whichthe piston rods 33 and 34 are rigidly secured. The piston rods, 33 and34 reciprocate in compressed air cylinders 33' and 34' and actuate thefeeder slide 3|, said slide traveling in suitable gibbed ways 35 whichare mounted on the outward face of the portion 36.

A solenoid 33, mounted on the bed portion ID, has mounted in the plungerthereof a flat steel plate having a rectangular slot therein, said slotbeing provided to receive the free end of the lever 24 for thepurpose ofretracting said lever 24, to disengage the catch 25 from the valve lever26, and thereby actuate a compressed air by the hydraulic ram 2, isprovided with gibbed piston in the cylinder 34' to return theslide 3| toa neutral or closed position under the hop- Per 30. The horizontalplaten 2--a which is actuated ways 40," in which a mold-closing andarticlestripping sub platen 2-b is reciprocably mounted. 'Thereciprocating article-stripping movement of the sub platen 2--b iscontrolled by on Y upright steel bar 4| rigidly attached to the vertical platen |--r, the upper end of said, her 4| being enclosedwithin arectangular recess 42 in the rear end of the sub-platen 2b, the said barand recess forming a lost-motion connection between the platen l-a'andthe sub-platen 211. A-

steel plate 43, which provides a'closure-for the rectangular recess 42,has mounted therein two set screws for the purpose of limitingethetravel of the'bar 4| to a predetermined distance before said bar 4|moves the sub platen 2b rear v ward in the articleestripping. direction.The se screws are secured in the desired position by lock nuts 45. Thetravelfof sub-platen 2b is limited at its other and ban, steel plate 43secured to the platen 2a, said plate forming a closure -for the gibbedways in the platen 2a. Set screws 41 are mounted in said plate tolimit'the :forward movement of sub-platen 2b, these" screws being lockedin position by lock nuts 44. (See,

the stripping platen, so that when the mold sections are separated thecore piece acts as an article-stripping projection. When the forwardedg'eof the sub-platen engages the screws 41 the core piece 0 iscentered directly over the mold the molding material into all parts ofthe mold and as means to connect the niolded article to 41-6. The lostmotion connection between the platen and the horizontal sub-platen 2formed by the bar 4|, the recess 42 and the set screws 44 provides ameans-for securing a variable dwell or pause between the reciprocalmovement of the platen I and the sub-platen 2. By adjusting the screws44 the dwell ,or pause may be varied to suit the operating conditions ofthe press.

Stud bolts 43 withlock nuts 50 are placed in the hydraulic cylindermountings and 2' to limit the retracted travel of the platens la and 2awhen actuated by their respective controlling rams.

The electrical timing means diagrammatically illustrated in Figs. 5 and6 comprises a shaft A driven by motor M and carrying a sleeve B, saidsleeve being electrically insulated from the shaft .A. On the sleeve Bis mounted a contact disc C which receives main-line current throughcon- ,ing moved to its retracted position. This upwardmovement of theplaten 2a carries upward the link 24, and the catch 25 on said linkengages the air valve control lever 26 and moves it upwardly. The upwardmovement of lever 26 opens an air port to admit air to cylinder 33' toactuate the piston 33 andlthereby move the slide 3| inwardly to placethe feeder on said slide directly .over the mold opening. The feeder,having been previously charged from the hopper 30 with molding material,delivers the "material into the mold, filling it for the moldingoperation. The timer then energizes solenoid 39 which retracts link 24thereby disengaging the catch 25 from the air valve lever 26. The spring31 connected to the air valve lever 26 returns the lever to its lowerposition thereby opening an air port to cylinder .34 to actuate piston34 to retiun the slide 3| to its normal position under hopper 30,asshowninFlg l. it

The mold having been filled, the timer energizes solenoid 2| which.controls thejdownward movement of the ram 2 and the horizontal platen2a and the mold-closing sub-platen 2b. The

downward movement of ram 2 causes the subplaten toclose the mold, andcore section 0 mounted on the sub-platen enters the mold and .forcesthemolding powder into all parts of the mold.

"valve-operating. lever l4 to admit fluid to the lower end of the ramcylinder to move the ram animus .2 Whenthe ram 2 has movedw'wardiyafrmtionoi!aninchthetimereneriiiiies the solenoid l9 and operateslever I! which controls a valve to admit fluid pressure to the cylinderof ram l to retract said ram to open the mold.n The very slight upwardmovement of ram 2 before the mold is opened strips the core piece fromthe molded article but does not remove the core piece from the moldedarticle. While the core piece is still within the molded article ram lmoves to open the mold, and, the molded arti- 'cle being held by thecore piece, this opening bar ll carried by the platen la contacts thescrews 44 mounted on the sub-platen 2b. when the bar ll contacts screws44 the further'rctracting movement of the platen la pulls the sub-platen2b to the rear in article-stripping di-- rection, that is toward theright as viewed in Fig; 1, thereby causing the core section c to stripthe molded article from the mold section b attached to the flxed platenlb. The molded article may then drop from the core piece 0 through anopening in the press bed It and into a suitable container (not-- shown).The timer then energizes solenoid i8 which reverses the position oflever I! to admit fluid pressure to the cylinder of ram I to move saidram and platen la carried thereby to again close the mold. Themold-closing movement of platen la causes bar ll to move sub-platen 2bback to its central position with its forward edge in engagement withthe stopscrews 41 and the core piece c centered directly over the mold.This return movement:

of the sub-platen 2b may be brought about durmold-forming members,power-operated means ing the-upward movementof the platen is to itsfully retracted position due to the fact that the bar ll extendsupwardly through the opening 42 in the rear end of the sub-platen lb.

. Fig. 6 diagrammatically illustrates the positions of the contact camswith respect. to their contact points 20), 2|, It", i8 and 39'', withthe press mechanism in the position illustrated in Fig. 1., The contactcams rotate counterclockwise as illustrated in this figure. Contact cam20" has encased and its contact 20'' acterof the piece to be molded, andmay be thereby energizing solenoid" 20, and the ram .2 has moved clos'e'to the limit. of its upward travel. Contact cam i9 has engaged andpassed its contact l9"; Solenoid i! was energized to bring about thewithdrawal of'ram I. The engagement of cam I! with its contact followsclosely upon the engagement of cam 20 withits contact. Contact cam ll"has engaged and passed its contact ll". Solenoid II was energized andram I moved inwardly to the limit of its movement. Contact cam 39' hasjust engaged and passed its contact a". Solenoid 39 was energized andthe feeder slide ll withdrawn.

Contact cam 2| is shown as approaching its contact li to energizesolenoid II to thereby reverse the movement of ram 2 team the mold.- Themold thenremains closed until contact. cam 20' again engages its contact20' and again energizes solenoid 20 to bring about'the upward movementof ram 2. The curing time is determined by the time elapsing between theengagement of contact cam II with its contact Ill}. and themgagement ofcontact cam 20' with its contact 20". The operating cycle is determinedby the charvaried with respect to the.intervals between the variousphases thereof, by means provided in theelectric timer.'Ihepressmaybemanually operated-when desirable, and the sequence ofoperation is identical with that controlled automatically. Y

Compressed air being necessary to clean the molds between each operatingcycle, makes it. desirable and economical to use pneumatic control meansfor the various phases of press operation. They are quick in action,less costly to' manufacture,.and not subject to frequent repairs.Standard solenoid hydraulic valves can be used to replace thepneumatically controlled hydraulic valves if desired, and a hydraulicram may be substituted for the pneumatically controlled feeder slidemovement.

The jacketed hopper 30 is soconstructed that any suitable fluidmeans maybe used for heat-- ing the hopper in instances where preheating of themolding powder is found necessary.

What is claimed as the invention and desired to be secured byLettersPatent, is:

1. In a press having hydraulic means angularly disposed therein, thevcombination of a vertically movable horizontal platen, a reciprocablehorizontally movable sub-platen mounted on said horizontal platen andprovided with an openlug in one end thereof, adjustable means carried bythe sub-platen and entering said opening for the purpose of restrictingthe opening to a predetermined size, and a movable vertical platen.

having a rigid-vertical member mounted thereon and extending through theopening in" the subplaten and engaging the said adjustable means to movethe sub-platen in a horizontal plane.

2. A molding press comprising two vertically disposed platens carryingseparable cooperating for moving one ofsaid platens horizontally awayfrom the other platen to separate the -moldforming members, a verticallymovable horizontally disposed platen above the vertically dis- .posedplatens, power-operated means for recipro-.

eating said vertically movable platen, a-horizontally reclp'rocablesub-platen mounted on .the said horizontally disposed platen, a corepiece depending from .the said sub-platenand adapted to enter the moldwhen the horizontal platen is 'moved downwardly to close the mold, andlostmotion means connected to the horizontally movable vertical platenandto the sub-platen to cause a delayed horizontal movementof thesubplaten during the mold-opening'movement of the vertical platen.

3. In a press, the combination of a fixed vertical platen, ahorizontally movable vertical platen.

cooperating with said'- platen; a vertically movable horizontal platen,a horizontally movable reciprocable sub-platen mounted on the horizontalplaten, adjustable means mounted on the horizontal platen tolimit themovement of the sub-platen, said sub-platen being provided with :anopening in one end, adjustable means carried by the sub-platen andextending into said openof the sub-platen during the receding stroke01.,

4 horizontal platen andhydraulic ram operating.

it, a reciprocable sub-platen moimted on said horizgntal platen, andadjustable lost-motion means between the movable vertical platen and thesubplaten and connected to and operated by the movable vertical platen.said lost-motion means determining the extent of the lateral movementthe hydraulic ram controlling the movable vertical platen. 4

5. In a press comprising hydraulic means anglilarl'y disposed thereimthecombination or a vertically movable horizontal platen and a hydraulicram operating it, a reciprocable sub-platen carried by said horizontalplaten and movable in a horizontal plane, adjustable means mounted onthehorizontal platen to limit the movement of the sub-platen tomold-forming position, said subplaten being provided with an opening inone end, adjustable means extending into'said opening, a fixed verticalplaten, a movable vertical platen cooperating with said fixed platen toform a feeder slide mounted under said hopper, pneua mold, ahydraulicram operating said movable vertical platen, means on saidmovable vertical platen extending through the opening in thesub-platento move the sub-platen in a horizontal plane, a hopper, meanssupporting said hopper,

zontal platen, intermediate adjustable lost-motion means between themovable vertical platen and the sub-platen and connected to and operatedby the movable vertical platen to cause a movement of the sub-platenduring a part only of the receding strokes of the two hydraulic ramscontrolling the two movable platens, a hopper with means for supportingit, a reciprocating feeder slide under the hopper, pneumatic means foroperating the feeder slide, control means for the hydraulic rams,pneumatic means for operating the said control means, solenoid means tooperate the pneumatic means controlling the feeder slide,.

solenoid means to operate the pneumatic means connected to the saidcontrol means, and an automatic electric time control to energize thesaid solenoid'means in a predetermined cycleoi operations. a

7. A molding press comprisingtwo, platens car-- rying separablecooperating mold-forming members, power-operated means for moving one ofsaid platens away from the other platen to sep rate the mold-formingmembers, a platen adapted to be moved atan angle 'to the platenscarrying the mold-forming members to close. one end of the mold,power-operated means for recip ocating saidmold-closing platen,andlost-motion means connected to and operated by the movable platencarrying one of the mold members and connected to the mold-closingplaten to cause .a relative lateral movement between themold-closingplaten and the other platen carrying the other moldformingmember during a portion cnlyof the mold-opening movement of the saidmovable platen carrying one or the mold-forming members.

8. A molding press comprising two vertically disposed-platens separablecooperating mold-forming members, power-operated means for moving one ofsaid platens horizontally away from the other platen to separate themold-forming members, a vertically movable horizontally disposedmold-clodng platen above the vertically disposed platens, power-operatedmeans ifor reciprocating said vertically movable platen, a horiaontallyreciprocable sub-platen mounted on the said horizontally disposed platenand vertically movable with it, a core-piece depending from thesub-platen and adapted to enter'the mold when the horizontal platen ismoved downwardly to close the mold, and means connected to thehorizontally movable vertical platen and to the subplaten and operableby the movable vertical platen during the vertical movement ofthe'sub-platen to horizontally move the sub-platen during apart only orthe mold-opening movement of the said vertical platen.

9. A molding press comprising two platens carrying separable cooperatingmold-forming men hers, power-operated means for moving one of saidplatens away from the other platen to sepa-. Y,

rate the mold-forming members, a mold-closing plateninovable at an angleto the platens carryin opening movement, and means operating in timedrelation to the mold-opening movement of the movable platen carrying oneof the mold members and during a part only of said movement andoperatively connected to the core piece and eil'ecting a relativelateral movement between the core piece and the other platen carryingthe other moldforming member to detach the molded articlefrom said othermold-forming member.

10. A molding press comprising two platens car- 7 rying separablecooperating mold-forming members, power-operated means for moving one ofsaid platens away from the other platen to separate the mold-formingmembers, a platen movable at an angle to the platens carrying themold-formin membersto close one end of the mold, means supporting themold-closing platen for lateral movement transversely of the directionof its moldopem'ng movement, power-operated means for reciprocating saidmold-closing platen to close and open one end otthe mold, a core piececarried by the mold-closing-platen and adapted to enter the mold andcomplete the molding operation when the said platen/ls moved to closethe end or the mold, and means connected to and operated by the movableplaten carrying one or the mold members mold-forming members. to closeone end 01 the mold, power-operated means for reciprocating saidmold-closing platen, a stripping proiection carried by the mold-closingplaten and adapted to be embedded in the molded article when the saidplaten is moved to close the end or the mold, and

Q 5 lost-motion means connected to and operated by a movable platencarrying one of the mold members and connected to the platen carryingthe stripping projection in all positions of the said latter platen, toforce a-relative lateral stripping l9 movementbetween the strippingprojection and the platens carrying the mold-forming members to. detachthe molded article from the mold-torming members.

12. A molding press comprising two platens car- 16 rying separablecooperating mold-forming memhers, a power-operated means for moving oneof said platens away from the other platen to separate the mold-formingmembers, a mold-closing and article-stripping platen, means supportinggo said article-stripping platen for movement at an angle to the platenscarrying the'mold-iorming members to close one end or the mold, meanssupporting the mold-closing platen for lateral move-.

ment transversely or the direction or its mold- 25 opening movement,power-operated means for reciprocating said mold-closing platen to closeand open one end of. the mold, and means connected to the movable platencarrying one of the mold members and connectedto the article-strippingplaten so and operated by the mold-opening movement of said movableplaten and during a part only of said movement to force arela'tivelateral movement in article-stripping direction between the strippingplaten and the said other platen carrying the other mold-forming member,and means carried by the stripping platen to detach the molded articlefrom the said other mold-forming member.

13. A molding press comprising two platens carrying separablecooperating mold-forming mem- 40 bers, a power-operated means for movingone of said platens away from theother platen to separate themold-forming members, a mold-closing and article-stripping platen, meanssupporting said article-stripping platen for movement at an- 4; angle tothe platens carrying the mold-forming members to close and open one endof the mold, means supporting said article-stripping platen for lateralstripping movement transversely of the directlon of its mold-openingmovement, means for 50 forming a connection between the molded articleand the article-stripping platen when the mold is closed, power-operatedmeans for reciprocating said mold-closing and article-stripping platento close and open one end of the mold, and means as operating in timedrelation to the mold-opening movement or the movable platen carrying oneof the mold members and connected to the article- I stripping platen andoperating during a part only oi said mold-opening movement to force arelam tive lateral stripping movement in article-stripping directionbetween the stripping platenand the said. other. platen carrying theother mold iorming member to detach the molded article from said othermold-forming member.

g5 14. A molding press comprisingtwo platens car,-

angle to the platen carrying members to close and open one end of themold, 66

versely oi the direction oi its mold-opening movement, power-operatedmeans for reciprdcating said mold-closing and article-stripping platento close and open one end oi. the mold, and means operating in timedrelation to the. mold-opening 5' movement of the movable platen carryingone of the mold-forming members and during a part only of saidmold-opening movement and connected to the article-stripping platen tomove the stripping platen transversely of the direction or its mold- 10opening movement and during a part only or the mold-separating movementof the platen carrying one or the mold-forming members.

15. A molding press comprising two platens, carrying separablecooperating'mold-iorming memhers, power-operated means for moving one orsaid platens away from the other platen to separate the mold-formingmembers, a mold-closing and article-stripping platen, means supportingsaid article-stripping and mold-closing platen for movement atan angleto the platens carrying the mold-forming members to 'close one end 0!the mold, power-operated means for reciprocating said: mold-closingplaten, and lost-motion means connected to and operated by themold-opening movement 61 the movable platen carrying one or themold-members and connected to the article- K I tally reciprocablesub-platen mounted on the said horizontally. disposed platen, a corepiece depending from the sub-plate to enter the mold when '40 thehorizontal platen is oved downward to close the mold, power-operatedmeansior moving upwardly said horizontally disposed platen. and the corepiece, means for moving horizontally in moldopening direction one or theplatens carrying a ;mold-rorming member after the horizontal platen hasstarted its upward movement and while the said core piece is within themold, and means operating in timed relation to the mold-opening movementor the horizontally movable vertical platen-and connected to thesub-platen and operable during a part only 0! the mold-opening movemeritof said vertical platen to movethe sub-platen horizontally inarticle-strinnins direction during. the mold-opening movement or thevertical platen 86 and-whi1e the core piece is in the mold.

17. A molding press comprising two platens carrying separablecooperating mold-forming [memhers, one of said platens being movableaway from the other platen to separate the mold-forming to members, amold-closing and article-stripping platen, means supporting saidarticle-stripping and mold-closing platens for movement at'an thempld-iorming means supporting said article-stripping platen for lateralstripping movement transversely or the direction of. its mold-openingmovement, means vtor forming a connection between the molded ar-- ticleand article-stripping platen when. the mold is 79 closed. power-operatedmeans for reciprocating said mold-closing platen to close and open oneend oi the mold, power-operated means for moving in mold-openingdirection one or the platens carryin: a mold-forming member alter themold-closing fl and article stripping platen has started its movement inmold-opening direction and while the connection between the moldedarticle and the article-stripping platen is maintained, and means.

operating in timed relation to the mold-opening movement, of a movablemold-forming member and during a part only of said mold-opening movementand operable to move the stripping platen in str pping direction duringa part only of the moldopening movement of the said movable moldiormingmember and while the connection between the article andthe strippingplaten is maintained.

18. A molding press comprising two platens carrying separablecooperating mold-forming members, one oi said platens being movable awayfrom the other platen to separate the mold -iorming members, amold-closing and article-strippingplaten, meanslsu'pporti ng saidarticle-stripping and mold-closing platen for movement at an angle tothe platens carrying the mold-forming membars to close and open one -endor the mold, means supporting said article-stripping platen for lateralstripping movement transversely of the direction of its mold-openingmovement, hydraulic means for reciprcmating said mold-closing platen toclose and open one end of the mold, means for forming a connnectionbetween the molded artiaa'a'mcs platen carrying the movable mold-formingmemher and connected to the stripping platen and operative in timedrelation to the mold-opening movement of saidmovable platen to move thestripping platen transversely of its'mold-opening movement during a partonly or the mold-opening movement or the said movable mold-formin memberand while the connection between the the operations 0! the movableplatens in said predetermined cycle.

19. A molding press comprising a plurality of platens carrying separablecooperating moldforming members, power-operated means for relativelymoving said platens to separate the moldiorming members, a mold-closingplaten movable article and the stripping platen is maintained, and anautomatic electric time control means to time.

at an angle to the platens carrying the mold-iorm-' ing members to closeone end oi, the mold, poweroperated means for reciprocating saidmold-closing platen to close and open one end of the mold, a strippingprojection carried by the mold-closing platen and adapted to enter themold and to be embedded f in the molded article when the said platen ismoved to close the end of the mold, and

means for moving in mold-opening direction one of the platens carrying amold-iorming member during a part only of the mold-opening movement ofthe mold-closing platen and after the moldclosing platen has started itsmoid-opening'movement and while the stripping projection is within themold and in engagement with the molded article.

JOHN LAUTERBACH.

